iOS_类似京东添加到购物车动画

步骤如下:

1.新建一个类WYSShoppingCartAnimationTool, 继承NSObject:

.h
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface WYSShoppingCartAnimationTool : NSObject

/**
 加入购物车的动画效果
 
 @param goodsImage 商品图片
 @param startPoint 动画起点
 @param endPoint   动画终点
 @param completion 动画执行完成后的回调
 */
+ (void)addToShoppingCartWithGoodsImage:(UIImage *)goodsImage
                             startPoint:(CGPoint)startPoint
                               endPoint:(CGPoint)endPoint
                             completion:(void (^)(BOOL finished))completion;


@end

.m实现:
#import "WYSShoppingCartAnimationTool.h"

@implementation WYSShoppingCartAnimationTool


/**
 加入购物车的动画效果
 
 @param goodsImage 商品图片
 @param startPoint 动画起点
 @param endPoint   动画终点
 @param completion 动画执行完成后的回调
 */
+ (void)addToShoppingCartWithGoodsImage:(UIImage *)goodsImage startPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint completion:(void (^)(BOOL))completion{
    
    //------- 创建shapeLayer -------//
    CAShapeLayer *animationLayer = [[CAShapeLayer alloc] init];
    animationLayer.frame = CGRectMake(startPoint.x - 20, startPoint.y - 20, 40, 40);
    animationLayer.contents = (id)goodsImage.CGImage;
    
    // 获取window的最顶层视图控制器
    UIViewController *rootVC = [[UIApplication sharedApplication].delegate window].rootViewController;
    UIViewController *parentVC = rootVC;
    while ((parentVC = rootVC.presentedViewController) != nil ) {
        rootVC = parentVC;
    }
    while ([rootVC isKindOfClass:[UINavigationController class]]) {
        rootVC = [(UINavigationController *)rootVC topViewController];
    }
    
    //------ 添加layer到顶层视图控制器上------//
    [rootVC.view.layer addSublayer:animationLayer];
    
    
    //------- 创建移动轨迹 -------//
    UIBezierPath *movePath = [UIBezierPath bezierPath];
    [movePath moveToPoint:startPoint];
    [movePath addQuadCurveToPoint:endPoint controlPoint:CGPointMake(200 / WYSScreenWidth * WYSScreenWidth,(WYSScreenHeight - 280 / WYSScreenHeight * WYSScreenHeight))];
    // 轨迹动画
    CAKeyframeAnimation *pathAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
    CGFloat durationTime = 0.5; // 动画时间1秒
    pathAnimation.duration = durationTime;
    pathAnimation.removedOnCompletion = NO;
    pathAnimation.fillMode = kCAFillModeForwards;
    pathAnimation.path = movePath.CGPath;
    
    
    //------- 创建缩小动画 -------//
    CABasicAnimation *scaleAnimation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
    scaleAnimation.fromValue = [NSNumber numberWithFloat:1.0];
    scaleAnimation.toValue = [NSNumber numberWithFloat:0.5];
    scaleAnimation.duration = 0.5;
    scaleAnimation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut];
    scaleAnimation.removedOnCompletion = NO;
    scaleAnimation.fillMode = kCAFillModeForwards;
    
    
    // 添加轨迹动画
    [animationLayer addAnimation:pathAnimation forKey:nil];
    // 添加缩小动画
    [animationLayer addAnimation:scaleAnimation forKey:nil];
    
    
    //------- 动画结束后执行 -------//
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(durationTime * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [animationLayer removeFromSuperlayer];
        completion(YES);
});
    
}

@end

效果图:

QQ201.gif